(19)

(11)

EP 2 783 248 A1

(12)

(43) Date of publication: 01.10.2014 Bulletin 2014/40 (21) Application number: 12851590.5 (22) Date of filing: 30.10.2012

(51) International Patent Classification (IPC):  G02B 6/38(2006.01) (86) International application number: PCT/US2012/062526 (87) International publication number: WO 2013/077969 (30.05.2013 Gazette 2013/22)

(84) Designated Contracting States: AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR (30) Priority: 23.11.2011 US 201161563275 P (71) Applicant: ADC Telecommunications Inc. Berwyn, PA 19312 (US)	(72) Inventor: LU, Yu Eden Prairie, MN 55347 (US) (74) Representative: Patentanwälte Bressel und Partner mbB  Potsdamer Platz 10 10785 Berlin 10785 Berlin (DE)